WASHINGTON — U.S. Rep. Mark Udall over the last year repeatedly advocated and voted for tax breaks for power companies that use renewable sources. His wife invested in a green energy-stock fund.

Maggie Fox last year purchased between $15,001 and $50,000 worth of PowerShares Exchange Traded Fund Wilderhill Clean Energy, according to a financial disclosure released Monday.

Fox also held between $15,001 and $50,000 worth of Progress Energy Inc., a Fortune 250 energy company pursuing renewable energy technologies. Most of the electricity it produces, however, still comes from oil, gas and coal.

“Rep. Udall believes that renewable energy is the future of the state and our nation’s economy,” said Tara Trujillo, spokeswoman for Udall’s U.S. Senate campaign. “Of course he supports that economic vision in every way possible, including with his own investments.”

Wadhams said it was “deep hypocrisy” that Udall “attacks Big Oil while the Udall family personally profited from Big Oil stocks.”

One watchdog-group spokesman, however, said there isn’t a clear conflict.

PowerShares Exchange Traded Fund is an index fund, meaning no one company is benefiting, said Massie Ritsch, spokesman for opensecrets.org. Given the value of Udall’s holdings — which range between about $745,000 and about $1.6 million — the amount in the energy companies is small.

The revelation about Fox’s holdings came in financial disclosures filed by members of Congress.

The disclosures show wide ranges, however, making it difficult to determine exactly how much is invested.

Schaffer reported receiving nearly $227,000 in severance pay when he quit as vice president of Aspect Energy last year to run for Senate, the equivalent of about a year’s salary.

Democrats attacked the amount as inappropriate, given that Schaffer had worked for the Denver-based exploration and energy company for less than five years. He earned $210,000 in 2004 and $247,000 two years later, according to earlier disclosure filings.

“The oil industry has been funding Bob Schaffer’s campaign from the beginning,” said Taylor West, Udall spokeswoman. “It’s been giving him a six-figure salary since he got out of the Congress, and now they’re giving him almost a quarter of a million dollars when he’s doing nothing for them anymore.”

Alex Cranberg, chairman of Aspect Energy, said the company typically gives executives at Schaffer’s level between 12 and 24 months’ pay as severance.

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